Sparta Weather Records (USC00477997)

Record envelope, standing records and threshold days for Sparta (USC00477997), Wisconsin, United States, with 132 years of record.

Key Facts for Sparta

Sparta (USC00477997) is a weather station in Wisconsin, United States at 43.94 latitude and -90.82 longitude, 238 m (782 ft) above sea level.
The station reports from 1893 to 2024, 132 years of record.
1,464 records set at Sparta still stand.
Records are tracked for tmax, tmin, prcp, snow, snwd: an element needs 30 years of data to be eligible.
Sparta tied a daily record high maximum temperature of 19.4 C (66.9 F) on 12 March 2024.

About the Station

Location: Wisconsin, United States, 43.94 latitude, -90.82 longitude.
Elevation: 238 m (782 ft).
Period of record: 1893 to 2024, 132 years.
Eligible elements: tmax, tmin, prcp, snow, snwd.

Daily Record Envelope and 2026

0 days at or beyond a record

The band shows the record high and record low for each calendar day at Sparta. The lines show the 2026 daily maximum and minimum. 0 days in 2026 matched or passed a record. Temperatures are in degrees Celsius.

Daily record high and record low at Sparta, with 2026 drawn through them
Month	Highest record high	Lowest record low	2026 highest maximum	2026 lowest minimum
Jan	13.9 C (57.0 F)	-44.4 C (-47.9 F)	n/a	n/a
Feb	19.4 C (66.9 F)	-40.6 C (-41.1 F)	n/a	n/a
Mar	28.9 C (84.0 F)	-34.4 C (-29.9 F)	n/a	n/a
Apr	33.3 C (91.9 F)	-18.3 C (-0.9 F)	n/a	n/a
May	35.0 C (95.0 F)	-6.1 C (21.0 F)	n/a	n/a
Jun	37.8 C (100.0 F)	-1.1 C (30.0 F)	n/a	n/a
Jul	41.1 C (106.0 F)	4.4 C (39.9 F)	n/a	n/a
Aug	39.4 C (102.9 F)	1.1 C (34.0 F)	n/a	n/a
Sep	37.2 C (99.0 F)	-7.2 C (19.0 F)	n/a	n/a
Oct	32.2 C (90.0 F)	-12.2 C (10.0 F)	n/a	n/a
Nov	25.6 C (78.1 F)	-27.8 C (-18.0 F)	n/a	n/a
Dec	19.4 C (66.9 F)	-37.2 C (-35.0 F)	n/a	n/a

Which Years Hold Standing Records

1,464 standing records

1,464 records at Sparta still stand. 2012 holds the most, with 35.

Standing records at Sparta by the year they were set
Year set	Standing records
1893	18
1917	26
1918	7
1936	20
1937	26
1938	16
1939	30
1940	24
1941	26
1942	22
1943	15
1944	13
1945	14
1946	13
1947	33
1948	15
1949	13
1950	22
1951	22
1952	17
1953	12
1954	6
1955	20
1956	11
1957	7
1958	16
1959	14
1960	14
1961	6
1962	19
1963	25
1964	21
1965	22
1966	16
1967	15
1968	17
1969	13
1970	12
1971	18
1972	26
1973	17
1974	21
1975	9
1976	33
1977	24
1978	12
1979	11
1980	5
1981	7
1982	13
1983	14
1984	15
1985	15
1986	5
1987	12
1988	18
1989	13
1990	9
1991	31
1992	12
1993	6
1994	14
1995	17
1996	16
1997	12
1998	20
1999	16
2000	24
2001	16
2002	18
2003	15
2004	7
2005	7
2006	16
2007	18
2008	11
2009	10
2010	8
2011	11
2012	35
2013	9
2014	19
2015	11
2016	5
2017	18
2018	24
2019	19
2020	20
2021	16
2022	7
2023	13
2024	8

All-Time Record Progression

6 new records

6 all-time records were set at Sparta between 29 January 1966 and 14 September 1994. Each dot is a new record.

When Sparta set new all-time records
Date	Kind	Detail
1966-01-29	Record low maximum temperature	Record low maximum temperature -25.0 C (-13.0 F)
1971-01-04	Record daily snowfall	Record daily snowfall 45.7 cm (18.0 in)
1972-01-15	Record low maximum temperature	Record low maximum temperature -26.1 C (-15.0 F)
1978-07-01	Record daily precipitation	Record daily precipitation 115.6 mm (4.6 in)
1985-01-20	Record low maximum temperature	Record low maximum temperature -27.2 C (-17.0 F)
1994-09-14	Record daily precipitation	Record daily precipitation 137.7 mm (5.4 in)

Wettest Day of Each Month

Sep: 137.7 mm (5.4 in)

The wettest day on record for each calendar month at Sparta. The most was 137.7 mm (5.4 in) on 14 September 1994.

Record daily precipitation for each month at Sparta
Month	Record daily precipitation (mm)	Date
Jan	31.2 mm (1.2 in)	25 January 1967
Feb	38.1 mm (1.5 in)	19 February 1984
Mar	50.8 mm (2.0 in)	16 March 1983
Apr	96.5 mm (3.8 in)	25 April 1994
May	82.6 mm (3.3 in)	20 May 2022
Jun	99.3 mm (3.9 in)	8 June 2008
Jul	115.6 mm (4.6 in)	1 July 1978
Aug	107.2 mm (4.2 in)	28 August 2018
Sep	137.7 mm (5.4 in)	14 September 1994
Oct	62.7 mm (2.5 in)	7 October 2017
Nov	54.1 mm (2.1 in)	1 November 1984
Dec	58.4 mm (2.3 in)	14 December 2015

Period of Record Coverage

1893 to 2024

92 years of record at Sparta, 1893 to 2024. 14 years have data for under 90 percent of days and are left out of rankings: 1893, 1917, 1918, 1936, 1980, 1981, 1982, 1984 and others.

Days with data per year at Sparta
Year	Days with data	Share of year	Complete
1893	324	89%	No
1917	267	73%	No
1918	164	45%	No
1936	199	54%	No
1937	365	100%	Yes
1938	365	100%	Yes
1939	364	100%	Yes
1940	365	100%	Yes
1941	365	100%	Yes
1942	333	91%	Yes
1943	356	98%	Yes
1944	364	99%	Yes
1945	361	99%	Yes
1946	360	99%	Yes
1947	363	99%	Yes
1948	356	97%	Yes
1949	364	100%	Yes
1950	364	100%	Yes
1951	365	100%	Yes
1952	364	99%	Yes
1953	365	100%	Yes
1954	365	100%	Yes
1955	364	100%	Yes
1956	366	100%	Yes
1957	364	100%	Yes
1958	365	100%	Yes
1959	365	100%	Yes
1960	366	100%	Yes
1961	364	100%	Yes
1962	365	100%	Yes
1963	365	100%	Yes
1964	366	100%	Yes
1965	365	100%	Yes
1966	365	100%	Yes
1967	365	100%	Yes
1968	366	100%	Yes
1969	363	99%	Yes
1970	365	100%	Yes
1971	365	100%	Yes
1972	365	100%	Yes
1973	365	100%	Yes
1974	365	100%	Yes
1975	342	94%	Yes
1976	356	97%	Yes
1977	365	100%	Yes
1978	364	100%	Yes
1979	362	99%	Yes
1980	304	83%	No
1981	182	50%	No
1982	289	79%	No
1983	363	99%	Yes
1984	306	84%	No
1985	358	98%	Yes
1986	211	58%	No
1987	304	83%	No
1988	301	82%	No
1989	215	59%	No
1990	242	66%	No
1991	365	100%	Yes
1992	366	100%	Yes
1993	364	100%	Yes
1994	365	100%	Yes
1995	363	99%	Yes
1996	365	100%	Yes
1997	365	100%	Yes
1998	364	100%	Yes
1999	364	100%	Yes
2000	364	99%	Yes
2001	365	100%	Yes
2002	365	100%	Yes
2003	365	100%	Yes
2004	366	100%	Yes
2005	365	100%	Yes
2006	365	100%	Yes
2007	365	100%	Yes
2008	366	100%	Yes
2009	365	100%	Yes
2010	363	99%	Yes
2011	363	99%	Yes
2012	364	99%	Yes
2013	364	100%	Yes
2014	365	100%	Yes
2015	365	100%	Yes
2016	366	100%	Yes
2017	362	99%	Yes
2018	364	100%	Yes
2019	361	99%	Yes
2020	364	99%	Yes
2021	363	99%	Yes
2022	352	96%	Yes
2023	364	100%	Yes
2024	88	24%	No

Latest Records

Latest records at Sparta
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
12 March 2024	Sparta, US	daily high max (Tie)	19.4 C (66.9 F)	tie	12 years	3 of 100 (Routine)
4 March 2024	Sparta, US	daily high max	22.8 C (73.0 F)	5.6 C (10.1 F)	41 years	30 of 100 (Routine)
3 March 2024	Sparta, US	daily high max	16.1 C (61.0 F)	0.5 C (0.9 F)	78 years	33 of 100 (Routine)
28 February 2024	Sparta, US	monthly high max	19.4 C (66.9 F)	1.6 C (2.9 F)	0 years	22 of 100 (Routine)
27 February 2024	Sparta, US	monthly high max	17.8 C (64.0 F)	1.1 C (2.0 F)	40 years	33 of 100 (Routine)
9 February 2024	Sparta, US	daily high max	13.9 C (57.0 F)	2.2 C (4.0 F)	21 years	19 of 100 (Routine)
8 February 2024	Sparta, US	daily high min	1.1 C (34.0 F)	0.5 C (0.9 F)	85 years	35 of 100 (Notable)
7 February 2024	Sparta, US	daily high max	11.7 C (53.1 F)	3.9 C (7.0 F)	14 years	20 of 100 (Routine)
7 February 2024	Sparta, US	daily high min (Tie)	0.6 C (33.1 F)	tie	53 years	6 of 100 (Routine)
2 February 2024	Sparta, US	daily high max	9.4 C (48.9 F)	1.6 C (2.9 F)	80 years	36 of 100 (Notable)
1 February 2024	Sparta, US	daily high max (Tie)	9.4 C (48.9 F)	tie	12 years	3 of 100 (Routine)
31 January 2024	Sparta, US	daily high min (Tie)	-0.6 C (30.9 F)	tie	36 years	5 of 100 (Routine)
26 January 2024	Sparta, US	daily rain	8.1 mm (0.32 in)	0.5 mm (0.02 in)	28 years	19 of 100 (Routine)
25 December 2023	Sparta, US	daily high min	7.2 C (45.0 F)	2.8 C (5.0 F)	86 years	39 of 100 (Notable)
24 December 2023	Sparta, US	daily high min	3.3 C (37.9 F)	1.6 C (2.9 F)	82 years	36 of 100 (Notable)
27 October 2023	Sparta, US	daily high min	15.0 C (59.0 F)	3.9 C (7.0 F)	52 years	32 of 100 (Routine)
25 October 2023	Sparta, US	daily high min (Tie)	13.9 C (57.0 F)	tie	10 years	3 of 100 (Routine)
3 October 2023	Sparta, US	daily high max (Tie)	29.4 C (84.9 F)	tie	30 years	4 of 100 (Routine)
26 September 2023	Sparta, US	daily rain	45.7 mm (1.8 in)	5.3 mm (0.21 in)	50 years	28 of 100 (Routine)
5 September 2023	Sparta, US	daily high min	22.8 C (73.0 F)	2.8 C (5.0 F)	8 years	17 of 100 (Routine)

Climate Trend

76 complete years, 1937 to 2023

One stripe for each of 76 complete years at Sparta, 1937 to 2023. Blue stripes are years cooler than the station's own mean of 7.5 C (45.4 F); red stripes are warmer. The coolest year was 2014, at 5.1 C (41.2 F), and the warmest was 2012, at 9.8 C (49.6 F). The strongest colour marks a difference of 2.4 C (4.3 F).

Annual mean temperature at Sparta as warming stripes, 1937 to 2023
Year	Annual mean temperature	Difference from the station mean
1937	7.3 C	-0.19 C
1938	9.0 C	+1.54 C
1939	9.4 C	+1.89 C
1940	7.5 C	+0.06 C
1941	9.4 C	+1.97 C
1943	7.1 C	-0.33 C
1944	8.7 C	+1.21 C
1945	7.2 C	-0.23 C
1946	8.8 C	+1.35 C
1947	7.9 C	+0.42 C
1948	7.7 C	+0.18 C
1949	8.3 C	+0.78 C
1950	6.1 C	-1.42 C
1951	5.9 C	-1.58 C
1952	7.8 C	+0.34 C
1953	8.5 C	+0.98 C
1954	8.2 C	+0.77 C
1955	8.0 C	+0.52 C
1956	7.5 C	-0.01 C
1957	7.8 C	+0.28 C
1958	7.5 C	+0.04 C
1959	7.2 C	-0.29 C
1960	7.6 C	+0.09 C
1961	7.8 C	+0.28 C
1962	7.2 C	-0.24 C
1963	7.3 C	-0.22 C
1964	8.4 C	+0.91 C
1965	7.1 C	-0.40 C
1966	7.0 C	-0.45 C
1967	6.8 C	-0.69 C
1968	8.0 C	+0.50 C
1969	6.8 C	-0.64 C
1970	7.3 C	-0.18 C
1971	7.2 C	-0.24 C
1972	6.2 C	-1.25 C
1973	8.5 C	+1.01 C
1974	7.5 C	+0.06 C
1976	5.7 C	-1.79 C
1977	6.5 C	-0.99 C
1978	5.2 C	-2.23 C
1979	5.5 C	-1.99 C
1983	7.4 C	-0.06 C
1985	6.4 C	-1.06 C
1991	7.4 C	-0.07 C
1992	7.3 C	-0.15 C
1993	6.4 C	-1.04 C
1994	7.2 C	-0.26 C
1995	7.2 C	-0.26 C
1996	5.7 C	-1.77 C
1997	7.0 C	-0.48 C
1998	9.4 C	+1.96 C
1999	8.5 C	+1.06 C
2000	7.8 C	+0.35 C
2001	8.6 C	+1.10 C
2002	8.3 C	+0.80 C
2003	7.5 C	0.00 C
2004	7.7 C	+0.25 C
2005	8.6 C	+1.09 C
2006	8.8 C	+1.34 C
2007	8.2 C	+0.69 C
2008	6.3 C	-1.13 C
2009	6.8 C	-0.71 C
2010	8.2 C	+0.70 C
2011	7.6 C	+0.16 C
2012	9.8 C	+2.28 C
2013	6.2 C	-1.27 C
2014	5.1 C	-2.37 C
2015	7.6 C	+0.16 C
2016	8.3 C	+0.83 C
2017	7.6 C	+0.15 C
2018	6.7 C	-0.81 C
2019	6.1 C	-1.40 C
2020	7.4 C	-0.07 C
2021	8.0 C	+0.56 C
2022	6.3 C	-1.21 C
2023	8.4 C	+0.88 C

The fitted trend in annual mean temperature here over 1937 to 2023 is -0.05 C (-0.14 to 0.04) per decade. The interval includes zero, so the trend is not clearly different from zero. In Fahrenheit: -0.1 F (-0.2 to 0.1) per decade. The slope is a straight line fitted to 76 complete years; the brackets give its 95 percent interval.

Fitted temperature trends per decade at Sparta
Measure	Per decade (C)	Per decade (F)	Period	Complete years	Reading
Annual mean temperature	-0.05 C (-0.14 to 0.04) per decade	-0.1 F (-0.2 to 0.1) per decade	1937 to 2023	76	Not clearly different from zero
Mean daily maximum	-0.10 C (-0.18 to -0.01) per decade	-0.17 F (-0.33 to -0.02) per decade	1937 to 2023	76	Fall
Mean daily minimum	0.00 C (-0.10 to 0.09) per decade	-0.01 F (-0.17 to 0.16) per decade	1937 to 2023	76	Not clearly different from zero

A year is complete when all 12 months have at least 20 days of both daily maximum and daily minimum readings. The annual mean is the mean of the monthly means. The trend describes this one station over this period; it does not say what caused the change.

Extremes by Year

1893 to 2024

Yearly extremes at Sparta: the record and the median year
Measure	Record	Year of the record	Median year	Years with a value
Hottest day (TXx)	41.1 C (106.0 F)	1936	35.0 C (95.0 F)	92
Coldest night (TNn)	-44.4 C (-47.9 F)	1951	-31.7 C (-25.1 F)	92
Wettest day (Rx1day)	137.7 mm (5.4 in)	1994	57.4 mm (2.3 in)	92
Wettest five days (Rx5day)	168.2 mm (6.6 in)	1944	90.9 mm (3.6 in)	92
Longest dry spell (CDD)	58 days	1976	22 days	92

Hottest day (TXx)

The hottest day of the year at Sparta, 1893 to 2024. The record is 41.1 C (106.0 F) in 1936, marked on the chart; the median year is 35.0 C (95.0 F).

Hottest day (TXx) at Sparta by year
Year	Hottest day (TXx)
1893	35.0 C (95.0 F)
1917	35.0 C (95.0 F)
1918	35.0 C (95.0 F)
1936	41.1 C (106.0 F)
1937	38.3 C (100.9 F)
1938	33.9 C (93.0 F)
1939	37.2 C (99.0 F)
1940	36.7 C (98.1 F)
1941	38.3 C (100.9 F)
1942	33.9 C (93.0 F)
1943	35.0 C (95.0 F)
1944	35.6 C (96.1 F)
1945	34.4 C (93.9 F)
1946	32.8 C (91.0 F)
1947	36.1 C (97.0 F)
1948	37.8 C (100.0 F)
1949	35.0 C (95.0 F)
1950	31.1 C (88.0 F)
1951	30.6 C (87.1 F)
1952	33.3 C (91.9 F)
1953	35.6 C (96.1 F)
1954	33.9 C (93.0 F)
1955	37.2 C (99.0 F)
1956	33.9 C (93.0 F)
1957	34.4 C (93.9 F)
1958	34.4 C (93.9 F)
1959	33.9 C (93.0 F)
1960	33.9 C (93.0 F)
1961	35.6 C (96.1 F)
1962	33.3 C (91.9 F)
1963	36.7 C (98.1 F)
1964	37.8 C (100.0 F)
1965	36.1 C (97.0 F)
1966	36.1 C (97.0 F)
1967	33.3 C (91.9 F)
1968	34.4 C (93.9 F)
1969	33.9 C (93.0 F)
1970	34.4 C (93.9 F)
1971	33.9 C (93.0 F)
1972	34.4 C (93.9 F)
1973	35.6 C (96.1 F)
1974	37.8 C (100.0 F)
1975	35.0 C (95.0 F)
1976	36.1 C (97.0 F)
1977	36.1 C (97.0 F)
1978	35.6 C (96.1 F)
1979	32.2 C (90.0 F)
1980	33.3 C (91.9 F)
1981	32.2 C (90.0 F)
1982	36.7 C (98.1 F)
1983	36.1 C (97.0 F)
1984	36.1 C (97.0 F)
1985	35.0 C (95.0 F)
1986	34.4 C (93.9 F)
1987	36.1 C (97.0 F)
1988	38.9 C (102.0 F)
1989	36.7 C (98.1 F)
1990	34.4 C (93.9 F)
1991	35.6 C (96.1 F)
1992	33.9 C (93.0 F)
1993	32.8 C (91.0 F)
1994	35.6 C (96.1 F)
1995	40.6 C (105.1 F)
1996	35.6 C (96.1 F)
1997	34.4 C (93.9 F)
1998	33.3 C (91.9 F)
1999	37.8 C (100.0 F)
2000	33.9 C (93.0 F)
2001	37.8 C (100.0 F)
2002	36.1 C (97.0 F)
2003	36.7 C (98.1 F)
2004	31.7 C (89.1 F)
2005	36.1 C (97.0 F)
2006	38.3 C (100.9 F)
2007	36.1 C (97.0 F)
2008	32.8 C (91.0 F)
2009	35.6 C (96.1 F)
2010	34.4 C (93.9 F)
2011	36.7 C (98.1 F)
2012	39.4 C (102.9 F)
2013	35.0 C (95.0 F)
2014	32.2 C (90.0 F)
2015	33.9 C (93.0 F)
2016	33.9 C (93.0 F)
2017	33.3 C (91.9 F)
2018	35.0 C (95.0 F)
2019	33.9 C (93.0 F)
2020	35.6 C (96.1 F)
2021	35.6 C (96.1 F)
2022	35.6 C (96.1 F)
2023	39.4 C (102.9 F)
2024	22.8 C (73.0 F)

Coldest night (TNn)

The coldest night of the year at Sparta, 1893 to 2024. The record is -44.4 C (-47.9 F) in 1951, marked on the chart; the median year is -31.7 C (-25.1 F).

Coldest night (TNn) at Sparta by year
Year	Coldest night (TNn)
1893	-39.4 C (-38.9 F)
1917	-36.1 C (-33.0 F)
1918	-39.4 C (-38.9 F)
1936	-27.8 C (-18.0 F)
1937	-36.7 C (-34.1 F)
1938	-26.7 C (-16.1 F)
1939	-25.0 C (-13.0 F)
1940	-36.1 C (-33.0 F)
1941	-26.1 C (-15.0 F)
1942	-33.9 C (-29.0 F)
1943	-36.7 C (-34.1 F)
1944	-27.8 C (-18.0 F)
1945	-31.7 C (-25.1 F)
1946	-33.3 C (-27.9 F)
1947	-34.4 C (-29.9 F)
1948	-32.8 C (-27.0 F)
1949	-35.6 C (-32.1 F)
1950	-37.2 C (-35.0 F)
1951	-44.4 C (-47.9 F)
1952	-35.0 C (-31.0 F)
1953	-28.3 C (-18.9 F)
1954	-32.2 C (-26.0 F)
1955	-29.4 C (-20.9 F)
1956	-31.1 C (-24.0 F)
1957	-33.9 C (-29.0 F)
1958	-33.9 C (-29.0 F)
1959	-33.9 C (-29.0 F)
1960	-27.2 C (-17.0 F)
1961	-31.7 C (-25.1 F)
1962	-34.4 C (-29.9 F)
1963	-41.7 C (-43.1 F)
1964	-27.8 C (-18.0 F)
1965	-36.1 C (-33.0 F)
1966	-33.3 C (-27.9 F)
1967	-39.4 C (-38.9 F)
1968	-33.9 C (-29.0 F)
1969	-31.7 C (-25.1 F)
1970	-35.0 C (-31.0 F)
1971	-36.7 C (-34.1 F)
1972	-34.4 C (-29.9 F)
1973	-32.8 C (-27.0 F)
1974	-31.7 C (-25.1 F)
1975	-33.3 C (-27.9 F)
1976	-34.4 C (-29.9 F)
1977	-37.8 C (-36.0 F)
1978	-31.1 C (-24.0 F)
1979	-37.2 C (-35.0 F)
1980	-26.7 C (-16.1 F)
1981	-31.7 C (-25.1 F)
1982	-40.0 C (-40.0 F)
1983	-35.6 C (-32.1 F)
1984	-31.7 C (-25.1 F)
1985	-36.1 C (-33.0 F)
1986	-32.2 C (-26.0 F)
1987	-31.1 C (-24.0 F)
1988	-31.7 C (-25.1 F)
1989	-31.7 C (-25.1 F)
1990	-32.8 C (-27.0 F)
1991	-32.2 C (-26.0 F)
1992	-23.3 C (-9.9 F)
1993	-27.8 C (-18.0 F)
1994	-36.7 C (-34.1 F)
1995	-23.9 C (-11.0 F)
1996	-40.6 C (-41.1 F)
1997	-26.7 C (-16.1 F)
1998	-26.7 C (-16.1 F)
1999	-31.1 C (-24.0 F)
2000	-33.3 C (-27.9 F)
2001	-22.2 C (-8.0 F)
2002	-28.3 C (-18.9 F)
2003	-26.7 C (-16.1 F)
2004	-31.1 C (-24.0 F)
2005	-25.0 C (-13.0 F)
2006	-31.7 C (-25.1 F)
2007	-28.9 C (-20.0 F)
2008	-31.1 C (-24.0 F)
2009	-35.0 C (-31.0 F)
2010	-29.4 C (-20.9 F)
2011	-28.9 C (-20.0 F)
2012	-26.7 C (-16.1 F)
2013	-27.8 C (-18.0 F)
2014	-30.6 C (-23.1 F)
2015	-28.3 C (-18.9 F)
2016	-26.1 C (-15.0 F)
2017	-23.3 C (-9.9 F)
2018	-28.3 C (-18.9 F)
2019	-37.8 C (-36.0 F)
2020	-30.0 C (-22.0 F)
2021	-30.0 C (-22.0 F)
2022	-32.2 C (-26.0 F)
2023	-27.2 C (-17.0 F)
2024	-25.6 C (-14.1 F)

Wettest day (Rx1day)

The wettest day of the year at Sparta, 1893 to 2024. The record is 137.7 mm (5.4 in) in 1994, marked on the chart; the median year is 57.4 mm (2.3 in).

Wettest day (Rx1day) at Sparta by year
Year	Wettest day (Rx1day)
1893	83.1 mm (3.3 in)
1917	76.2 mm (3.0 in)
1918	66.0 mm (2.6 in)
1936	38.9 mm (1.5 in)
1937	51.3 mm (2.0 in)
1938	77.0 mm (3.0 in)
1939	33.3 mm (1.3 in)
1940	51.3 mm (2.0 in)
1941	102.4 mm (4.0 in)
1942	93.0 mm (3.7 in)
1943	58.7 mm (2.3 in)
1944	55.4 mm (2.2 in)
1945	50.8 mm (2.0 in)
1946	45.7 mm (1.8 in)
1947	64.8 mm (2.6 in)
1948	34.5 mm (1.4 in)
1949	40.4 mm (1.6 in)
1950	61.5 mm (2.4 in)
1951	40.6 mm (1.6 in)
1952	46.0 mm (1.8 in)
1953	27.4 mm (1.1 in)
1954	59.7 mm (2.4 in)
1955	65.0 mm (2.6 in)
1956	35.1 mm (1.4 in)
1957	34.0 mm (1.3 in)
1958	45.5 mm (1.8 in)
1959	44.5 mm (1.8 in)
1960	49.5 mm (1.9 in)
1961	51.6 mm (2.0 in)
1962	81.5 mm (3.2 in)
1963	68.1 mm (2.7 in)
1964	43.4 mm (1.7 in)
1965	56.1 mm (2.2 in)
1966	47.2 mm (1.9 in)
1967	77.0 mm (3.0 in)
1968	58.7 mm (2.3 in)
1969	60.2 mm (2.4 in)
1970	47.2 mm (1.9 in)
1971	41.9 mm (1.6 in)
1972	59.9 mm (2.4 in)
1973	87.6 mm (3.4 in)
1974	35.3 mm (1.4 in)
1975	68.1 mm (2.7 in)
1976	52.1 mm (2.1 in)
1977	66.0 mm (2.6 in)
1978	115.6 mm (4.6 in)
1979	44.7 mm (1.8 in)
1980	82.6 mm (3.3 in)
1981	40.4 mm (1.6 in)
1982	48.3 mm (1.9 in)
1983	92.2 mm (3.6 in)
1984	81.3 mm (3.2 in)
1985	37.8 mm (1.5 in)
1986	69.1 mm (2.7 in)
1987	56.1 mm (2.2 in)
1988	44.7 mm (1.8 in)
1989	69.9 mm (2.8 in)
1990	45.0 mm (1.8 in)
1991	67.8 mm (2.7 in)
1992	64.0 mm (2.5 in)
1993	48.8 mm (1.9 in)
1994	137.7 mm (5.4 in)
1995	34.3 mm (1.4 in)
1996	42.7 mm (1.7 in)
1997	52.1 mm (2.1 in)
1998	66.0 mm (2.6 in)
1999	51.3 mm (2.0 in)
2000	80.3 mm (3.2 in)
2001	64.0 mm (2.5 in)
2002	93.5 mm (3.7 in)
2003	46.5 mm (1.8 in)
2004	79.5 mm (3.1 in)
2005	38.9 mm (1.5 in)
2006	39.1 mm (1.5 in)
2007	78.7 mm (3.1 in)
2008	99.3 mm (3.9 in)
2009	75.2 mm (3.0 in)
2010	75.4 mm (3.0 in)
2011	38.1 mm (1.5 in)
2012	39.6 mm (1.6 in)
2013	53.8 mm (2.1 in)
2014	66.3 mm (2.6 in)
2015	75.7 mm (3.0 in)
2016	84.3 mm (3.3 in)
2017	110.2 mm (4.3 in)
2018	107.2 mm (4.2 in)
2019	59.9 mm (2.4 in)
2020	45.0 mm (1.8 in)
2021	59.4 mm (2.3 in)
2022	82.6 mm (3.3 in)
2023	45.7 mm (1.8 in)
2024	8.1 mm (0.32 in)

Wettest five days (Rx5day)

The wettest five days of the year at Sparta, 1893 to 2024. The record is 168.2 mm (6.6 in) in 1944, marked on the chart; the median year is 90.9 mm (3.6 in).

Wettest five days (Rx5day) at Sparta by year
Year	Wettest five days (Rx5day)
1893	83.1 mm (3.3 in)
1917	79.2 mm (3.1 in)
1918	72.1 mm (2.8 in)
1936	51.6 mm (2.0 in)
1937	68.6 mm (2.7 in)
1938	153.2 mm (6.0 in)
1939	45.2 mm (1.8 in)
1940	72.6 mm (2.9 in)
1941	116.4 mm (4.6 in)
1942	130.7 mm (5.1 in)
1943	85.4 mm (3.4 in)
1944	168.2 mm (6.6 in)
1945	104.4 mm (4.1 in)
1946	92.7 mm (3.6 in)
1947	70.3 mm (2.8 in)
1948	53.6 mm (2.1 in)
1949	58.9 mm (2.3 in)
1950	87.7 mm (3.5 in)
1951	59.2 mm (2.3 in)
1952	61.4 mm (2.4 in)
1953	65.0 mm (2.6 in)
1954	100.2 mm (3.9 in)
1955	120.9 mm (4.8 in)
1956	38.6 mm (1.5 in)
1957	58.2 mm (2.3 in)
1958	77.0 mm (3.0 in)
1959	84.9 mm (3.3 in)
1960	91.2 mm (3.6 in)
1961	66.3 mm (2.6 in)
1962	135.9 mm (5.4 in)
1963	93.5 mm (3.7 in)
1964	82.0 mm (3.2 in)
1965	94.2 mm (3.7 in)
1966	68.1 mm (2.7 in)
1967	123.9 mm (4.9 in)
1968	96.5 mm (3.8 in)
1969	123.8 mm (4.9 in)
1970	69.8 mm (2.7 in)
1971	54.1 mm (2.1 in)
1972	104.9 mm (4.1 in)
1973	97.1 mm (3.8 in)
1974	78.0 mm (3.1 in)
1975	109.9 mm (4.3 in)
1976	88.2 mm (3.5 in)
1977	77.0 mm (3.0 in)
1978	162.5 mm (6.4 in)
1979	58.2 mm (2.3 in)
1980	131.1 mm (5.2 in)
1981	65.0 mm (2.6 in)
1982	92.2 mm (3.6 in)
1983	126.2 mm (5.0 in)
1984	90.5 mm (3.6 in)
1985	75.8 mm (3.0 in)
1986	92.5 mm (3.6 in)
1987	122.2 mm (4.8 in)
1988	130.8 mm (5.1 in)
1989	71.4 mm (2.8 in)
1990	100.1 mm (3.9 in)
1991	88.1 mm (3.5 in)
1992	136.6 mm (5.4 in)
1993	160.8 mm (6.3 in)
1994	151.7 mm (6.0 in)
1995	64.3 mm (2.5 in)
1996	47.8 mm (1.9 in)
1997	56.2 mm (2.2 in)
1998	117.0 mm (4.6 in)
1999	80.8 mm (3.2 in)
2000	110.5 mm (4.4 in)
2001	92.2 mm (3.6 in)
2002	110.3 mm (4.3 in)
2003	63.9 mm (2.5 in)
2004	147.1 mm (5.8 in)
2005	78.0 mm (3.1 in)
2006	74.1 mm (2.9 in)
2007	142.9 mm (5.6 in)
2008	161.0 mm (6.3 in)
2009	116.9 mm (4.6 in)
2010	105.1 mm (4.1 in)
2011	70.8 mm (2.8 in)
2012	80.9 mm (3.2 in)
2013	78.5 mm (3.1 in)
2014	106.7 mm (4.2 in)
2015	127.3 mm (5.0 in)
2016	136.7 mm (5.4 in)
2017	125.7 mm (4.9 in)
2018	148.8 mm (5.9 in)
2019	95.8 mm (3.8 in)
2020	86.6 mm (3.4 in)
2021	139.7 mm (5.5 in)
2022	112.3 mm (4.4 in)
2023	87.1 mm (3.4 in)
2024	16.0 mm (0.6 in)

Longest dry spell (CDD)

The longest dry spell of the year at Sparta, 1893 to 2024. The record is 58 days in 1976, marked on the chart; the median year is 22 days.

Longest dry spell (CDD) at Sparta by year
Year	Longest dry spell (CDD)
1893	23 days
1917	22 days
1918	17 days
1936	24 days
1937	37 days
1938	21 days
1939	36 days
1940	20 days
1941	22 days
1942	38 days
1943	53 days
1944	27 days
1945	16 days
1946	25 days
1947	39 days
1948	22 days
1949	36 days
1950	30 days
1951	20 days
1952	55 days
1953	30 days
1954	23 days
1955	17 days
1956	18 days
1957	28 days
1958	33 days
1959	27 days
1960	23 days
1961	23 days
1962	33 days
1963	15 days
1964	38 days
1965	16 days
1966	27 days
1967	23 days
1968	27 days
1969	18 days
1970	30 days
1971	14 days
1972	23 days
1973	19 days
1974	14 days
1975	14 days
1976	58 days
1977	18 days
1978	28 days
1979	24 days
1980	21 days
1981	18 days
1982	17 days
1983	18 days
1984	27 days
1985	11 days
1986	22 days
1987	22 days
1988	20 days
1989	14 days
1990	13 days
1991	14 days
1992	23 days
1993	14 days
1994	21 days
1995	22 days
1996	14 days
1997	13 days
1998	16 days
1999	27 days
2000	21 days
2001	24 days
2002	41 days
2003	24 days
2004	20 days
2005	17 days
2006	22 days
2007	21 days
2008	16 days
2009	34 days
2010	29 days
2011	14 days
2012	27 days
2013	23 days
2014	12 days
2015	39 days
2016	23 days
2017	20 days
2018	20 days
2019	18 days
2020	27 days
2021	20 days
2022	17 days
2023	24 days
2024	18 days

Each chart shows one value per year; the dot marks the record year. TXx is the hottest daily maximum, TNn the coldest daily minimum, Rx1day and Rx5day the largest one-day and five-day rain totals, and CDD the longest run of days with less than 1 mm of rain. A year with missing days can understate an extreme.

Frost Dates and Growing Season

76 years with a frost

Across 76 years with a frost, the median last spring frost at Sparta falls on 13 May and the median first autumn frost on 29 September, which leaves a median of 141 days between them.

In 1994 to 2023 the median growing season was 145 days. That is 9 days more than in 1937 to 1967.

Fitted over all years, the growing season changes by +1.4 days per decade at this station.

Frost dates and growing season at Sparta
Measure	Median, all years	Earliest period (1937 to 1967)	Recent period (1994 to 2023)	Recent against earliest	Fitted trend
Last spring frost	13 May	13 May	13 May	no change	-0.1 days per decade
First autumn frost	29 September	26 September	4 October	8 days later	+1.2 days per decade
Growing days	141 days	136 days	145 days	9 days more	+1.4 days per decade

A frost day is a day with a daily minimum at or below 0 C (32 F). The last spring frost and the first autumn frost are the last and first such days of the cold season, and growing days are the days between them. A negative trend for the last spring frost means it comes earlier.

Rainfall Return Levels

72 years, 1937 to 2023

A day with at least 56.4 mm (2.2 in) of rain is expected about once in 2 years. A day with at least 127.9 mm (5.0 in) of rain is expected about once in 100 years.

Rainfall return levels at Sparta: the daily rain expected about once in a given number of years
Expected about once in	A day with at least	Note
2 years	56.4 mm (2.2 in)
5 years	75.1 mm (3.0 in)
10 years	87.6 mm (3.4 in)
25 years	103.7 mm (4.1 in)
50 years	115.8 mm (4.6 in)
100 years	127.9 mm (5.0 in)	Longer than the 72 years of record

The levels come from a generalised extreme value (GEV) distribution fitted by L-moments to the wettest-day total of each year, 72 years of values from 1937 to 2023.

A return level is an estimate. It is least reliable for the long periods, 50 and 100 years, and for any period longer than the record behind the fit, where the fit has to reach past the largest day actually observed. It is not a forecast.

The largest wettest-day totals in the fit: 115.6 mm (4.6 in) in 1978; 110.2 mm (4.3 in) in 2017; 107.2 mm (4.2 in) in 2018.

Station Changes

3 suspected

3 changes were suspected in the annual mean temperature of Sparta, at 1992, 2006 and 2014. Each is measured against neighbouring stations.

Relative to 5 neighbouring stations, the station's annual mean temperature from 1992 ran 0.3 C (0.5 F) higher than in the years before (possible change).
Relative to 5 neighbouring stations, the station's annual mean temperature from 2006 ran 0.3 C (0.5 F) lower than in the years before (likely change).
Relative to 5 neighbouring stations, the station's annual mean temperature from 2014 ran 0.3 C (0.5 F) lower than in the years before (likely change).

Suspected changes in the annual mean temperature at Sparta, against neighbouring stations
Year	Shift (C)	Shift (F)	Strength	Neighbours
1992	+0.3	+0.5	possible	5
2006	-0.2	-0.4	likely	5
2014	-0.3	-0.5	likely	5

Possible change at the station (a move, a new instrument or a new site); the record is kept as measured. A "likely" change has a larger test statistic than a "possible" one. Neither says why the station differs from its neighbours. How changes are found, and the largest ones.

Climate Twins

2009 to 2023 against 1961 to 1990

Over 2009 to 2023, Sparta had a mean temperature of 7.3 C (45.2 F) and 934.7 mm (36.8 in) of rain a year. The 3 stations whose 1961 to 1990 climate was closest to that are Uw Arboretum - Madison (United States, 150 km away), Montreal McGill (Canada, 1,370 km away) and Brodhead Wwtp (United States, 187 km away).

Climate twins of Sparta: stations whose 1961 to 1990 climate is closest to its 2009 to 2023 climate
Twin station	Country	Distance away	Mean temperature, 1961-1990	Rain a year, 1961-1990	Climate difference
Uw Arboretum - Madison	United States	150 km (93 mi)	7.4 C (45.3 F)	936.2 mm (36.9 in)	0.79
Montreal McGill	Canada	1,370 km (851 mi)	7.3 C (45.1 F)	1,038.4 mm (40.9 in)	0.81
Brodhead Wwtp	United States	187 km (116 mi)	7.7 C (45.8 F)	860.0 mm (33.9 in)	0.83

Twins are stations, not cities. A twin is one of the three stations at least 100 km away whose earlier climate is closest to this station's recent one, so a close match does not mean the two places look alike in other ways. A station move or a gap in a record can change that station's averages. The list describes past climate; it is not a forecast and does not say what caused any change. How twins are found, and a search for any station.

Download the Data

Data for Sparta standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Sparta threshold days by year: CSV or JSON. Field meanings are on the data page.

Source: NOAA National Centers for Environmental Information, Global Historical Climatology Network Daily (GHCN-Daily). Records are computed by World Extreme Weather Monitor and are not official NOAA products. (US Government open data (NOAA NCEI)) Data as of 2026-10-13 (13 October 2026). Records are computed by this site and are not official.

Data as of 2025-12-31. Last revised 31 December 2025 (2025-12-31).